Nobody's really sure who invented this dish; the King Ranch has never laid claim to it. There are several variations on the ingredients as well; this version uses corn tortillas and is considered gluten free.
Adapted from Ready Set Eat
Preheat oven to 325 F. Spray a 9 x 13 casserole dish with nonstick cooking spray.
In a large skillet, melt butter over medium heat. Add bell pepper and onion and cook about 5 minutes or until tender.
Add both soups, tomatoes, and chicken, and stir to combine.
In the casserole dish layer 1/3 of the tortilla pieces, 1/3 of the chicken mixture, and 1/3 of the Cheddar cheese. Repeat layers two more times. Bake for 40 minutes or until bubbly.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.